export default {
	state: {
		cart: JSON.parse(uni.getStorageSync(
			'cart') || '[]'), // 包含{goods_id,goods_name,goods_price,goods_count,goods_small_logo,goods_state}
	},
	getters: {
		// 购物车的总数量
		total(state) {
			/* let c = 0
			state.cart.forEach(item => c += item.goods_count)
			return c */
			return state.cart.reduce((count, item) => { return count += item.goods_count }, 0)
		},
		// 结算商品的计算总数量
		checkedCount(state) {
			return state.cart.filter(x => x.goods_state).reduce((total, item) => { return total += item.goods_count },
				0)
		},
		// 计算勾选商品的价格
		checkedGoodsAmount(state) {
			return state.cart.filter(x => x.goods_state).reduce((total, item) => {
				return total += item.goods_count * item
					.goods_price
			}, 0).toFixed(2)
		}
	},
	mutations: {
		addToCart(state, goods) {
			const findResult = state.cart.find((item) => {
				return item.goods_id === goods.goods_id
			})
			if (!findResult) {
				state.cart.push(goods)
			} else {
				findResult.goods_count++
			}
			this.commit('saveToStorage')
		},
		saveToStorage(state) {
			uni.setStorageSync('cart', JSON.stringify(state.cart))
		},
		// 更新购物车的勾选状态
		updateGoodsState(state, goods) {
			const findResult = state.cart.find((item) => {
				return item.goods_id === goods.goods_id
			})
			if (findResult) {
				findResult.goods_state = goods.goods_state
				this.commit('saveToStorage')
			}
		},
		// 跟新商品数量
		updateGoodsCount(state, goods) {
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
			if (findResult) {
				findResult.goods_count = goods.goods_count
				this.commit('saveToStorage')
			}
		},
		// 根据Id删除对应的商品
		removeGoodsById(state, goods_id) {
			state.cart = state.cart.filter(x => x.goods_id !== goods_id)
			this.commit('saveToStorage')
		},
		// 更新全选的状态
		updateAllGoodsState(state, newState) {
			state.cart.forEach(x => x.goods_state = newState)
			this.commit('saveToStorage')
		},
	},
	actions: {},
}
